133202421 has 32 divisors (see below), whose sum is σ = 216023040. Its totient is φ = 80449200.

The previous prime is 133202393. The next prime is 133202501. The reversal of 133202421 is 124202331.

It is not a de Polignac number, because 133202421 - 2⁵ = 133202389 is a prime.

It is a super-2 number, since 2×133202421² = 35485769920522482, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 133202394 and 133202403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133202921) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113166 + ... + 114336.

It is an arithmetic number, because the mean of its divisors is an integer number (6750720).

Almost surely, 2^133202421 is an apocalyptic number.

133202421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

133202421 is a deficient number, since it is larger than the sum of its proper divisors (82820619).

133202421 is a wasteful number, since it uses less digits than its factorization.

133202421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1574 (or 1568 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 133202421 is about 11541.3353213569. The cubic root of 133202421 is about 510.7057012517.

Adding to 133202421 its reverse (124202331), we get a palindrome (257404752).

The spelling of 133202421 in words is "one hundred thirty-three million, two hundred two thousand, four hundred twenty-one".